python mytests/test.py data/roaddataset/raw/val/v1554.jpg configs/segformer/segformer_mit-b0_1xb4-20k_roaddataset-224x224.py work_dirs/segformer_mit-b0_1xb4-20k_roaddataset-224x224/iter_6000.pth --device cuda:0 --out-file result.jpg